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- https://phys.libretexts.org/Bookshelves/Relativity/Spacetime_Physics_(Taylor_and_Wheeler)/04%3A_Trip_to_Canopus/4.07%3A_Lorentz_Contraction"The factor by which the stick appears contracted in the rocket frame is just the same as the ratio of rocket time to Earth time for the outward trip. We on Earth agree that the time lapse on the rock..."The factor by which the stick appears contracted in the rocket frame is just the same as the ratio of rocket time to Earth time for the outward trip. We on Earth agree that the time lapse on the rocket clock is 20 years, but our 'explanation' rests on the invariance of the interval between the events of departure from Earth and arrival at Canopus."
- https://phys.libretexts.org/Bookshelves/University_Physics/Radically_Modern_Introductory_Physics_Text_I_(Raymond)/04%3A_Special_Relativity/4.05%3A_Lorentz_ContractionThe length of a moving object is measured by simultaneously measuring the positions of the front and the rear of the object and subtracting these two numbers. Now, the line passing through A and C in ...The length of a moving object is measured by simultaneously measuring the positions of the front and the rear of the object and subtracting these two numbers. Now, the line passing through A and C in the left panel is the line of simultaneity of the stationary reference frame. This says that the length of a moving object as measured in a stationary reference frame (X) is less than the actual length of the object as measured in its own reference frame (X′).
- https://phys.libretexts.org/Bookshelves/University_Physics/Mechanics_and_Relativity_(Idema)/10%3A_Einstein's_Postulates/10.02%3A_Consequences_of_Einstein's_PostulatesThe combination of Einstein's Postulates leads to a number of consequences that appear to be at odds with everyday experience. They imply that there are no such things as universal measures of time an...The combination of Einstein's Postulates leads to a number of consequences that appear to be at odds with everyday experience. They imply that there are no such things as universal measures of time and length, nor even agreement on whether events are simultaneous or not. The reason why we do not observe these consequences all the time is that their effects are very small for objects which are moving slowly (as compared to the speed of light).
